Ring for spinning machine



Dec. 1963 TAKASHI'KOBAYASHI ETAL 3,

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United States Patent ()fifice Edi-234 Patented Dec. 17, 1963 3,114,234 RING EUR SPHNNENG MAKIHENE Tnkashi Kohayashi and Higuchi, @salra-fn, .Iapan, assignors to Surnitemo Kinzolru Kogyo Kahushilei Kaisha, @sairi-shi, .lapan Filed Dec. 28, 1960, Ser. No. 79,013 Qlaims priority, application Eapan Dec. 28, 1959 11 Qlaims. (til. 57124) This invention relates to a ring for spinning machine which includes a floating ring with magnetism differently from the ring-traveller system of prior art.

In the ordinary ring-traveller system, a traveller circulates on the ring rail with disadvantage that it is apt to run into burn-off trouble whenever the spindle rotates at a velocity exceeding the prevailing limits of 10,000 to 12,000 rpm. This technical bottleneck in speed-up of the spinning machine is now removed by the present invention, since the floating ring according to the present invention does not develop any trouble such as burningoff of the traveller even by its rotation at high velocity, due to the fact that there is no friction contact between ring and traveller. Thus, the present invention resides in a ring for spinning machine, characterized by an inner ring of ferromagnetic material provided afloat on the inside of a ring magnet having poles in the vertical direction.

In order that the invention may be fully understood, it will now be described with reference to the accompanying drawings, in which:

FIG. 1 is a plan showing a ring, one embodiment of the invention;

FIG; 2 is a cross-section of the same;

FIG. 3 illustrates a similar view of the same in opera- I tion;

FIG. 4 is a plan showing a modified form of the ring according to the invention;

FIG. 5 is a cross-section of the same;

FIG. 6 illustrates the same in operation;

FIG. 7 is a diagram indicating the relation, under a given number of twist in calculation, between spindle rotation and number of twist, as compared with the ordinary ring-traveller system;

FIG. 8 shows the relation between number of twist in calculation and in measurement as compared with the ordinary ring-traveller system;

FIG. 9 shows slow running of the inner iron ring with the change in number of twist at a given spindle rotation velocity;

FIG. 10 indicates slow running of the inner iron ring with the change in spindle rotation velocity, under a given number of twist.

In FIGS 1 and 2, 1 represents a ring magnet having poles in its vertical direction, 2 a spacer and holder of non-magnetic material, and 3 an inner ring of ferromagnetic material such as iron. The inner ring 3 is adapted to be attracted by magneticflux of the magnet 'il in a manner that it is thereby kept hanging on the inside of the spacer 2. As the iron ring 3 is attracted by leakage flux flowing from one end face to the other end face of the magnet 1, the attractive force workable on the ring 3 is so moderated by the spacer 2 that the ring 3 is stabilized sit on a base 4. For safeguard of V fair hardness. Hence, good results will be obtained by plating of hard chromium on the surface of the spacer.

The spacer 2 is made of non-magnetic metallic material such as aluminum, copper or their alloys, stainless steel or the like, but, in using synthetic resin as material for the spacer, caution must be taken so that it is easy to have static electricity.

In FIG. 3, showing the ring of the invention in operation, ayarn 7 runs on a snail wire (not shown) from the roller part (not shown) of the spinning machine and then through the gap between the spacer 2 and the inner ring 3, and turns at the lower end of the ring 3 to be wound by a bobbin 5 located at the center of the ring 3 thereby forming a cop 6. In the course of this operation, the yarn '7 comes in touch with the surface of the ring 3 by rotation of the bobbin 5 and travels with the ring round the bobbin 5 at high speed to be twisted, while, with the circulation of the yarn 7 the ring 3 rotates also at high speed with leaps, touching intermittently the inside face of the spacer 2 but maintaining always its hanging state within the spacer 2.

It has been proposed to use a ring for spinning machine which includes two ring magnets in combination arranged inside and outside the ring so as to have opposite polarity to each other and to maintain the inner ring magnet afloat by their repulsion force. However, such ring is far from practical use, because there are defects that it involves serious difiiculties in machining the magnet and also in securing stability of the ring; furthermore, it is difiicult to control the interaction between poles and their neutral point, due to the variation of ring form or magnet material.

According to the invention, a machinable material is used for both an inner ring and a spacer and the ring is adapted to be hung by attractive force, so that greatly improved stability is attained as compared with prior ring systems supported by repulsion force. Hence, the ring of the invention satisfies not only the requirements of the ring for spinning machines, but also, aids in bringing about high speed operation.

The performance of the ring of the invention depends upon the material of the magnet, the thickness of the spacer, the shape of the iron ring and the clearance between the spacer and the iron ring.

In the test, a ring was used, consisting of a ring magnet of magnetic isotropic Fe-Al-Ji-Co magnet material (magnetic performance being approximately 6,000 Gauss in remanence and approximately 600 oersted in coercive force) having an outer diameter of 62 mm., an inner diameter of 57 mm. and a height of 10, 20 or 30 mm., a

brass spacer having a thickness of 1 mm. and an iron ring having an outer diameter of 49.5 mm., an inner diameter of 46.5 mm; and a height of 10 mm. It showed that with the ring magnet increased in height, the iron ring was inclined oif its level and attracted gradually toward the upper or lower end face of the magnet, so that stability is hardly secured.

Similar result was also shown when a ring was used, consisting of a ring magnet of the same quality and size except the height being 10 mm., a spacer of said kind and thickness, and an iron ring of said size except the height being 10 or 15 mm.

From the above test results it is apparent that horizontal stability can be secured when a ring magnet is about the same in height with an iron ring.

There is a wide variety of yarns to-be spun. Besides,

a each yarn is lacking in perfect homogeneity and not unithe inside surface of the spacer is needed to be smoothfaced and preferably to possess both wear resistance and form in its force that tends to break tie balance of the iron ring. Therefore, the ring and the magnet require change intheir respective forms, but, if the ring magnet requires its shape to be well-matched with the iron ring on all such occasions, it would give rise to operational diiiculties. However, such difficulties are completely obviated by the magnetization arranged as shown in FIGS. 4 and 5. In FIGS. 4 and 5, a ring magnet 1 have poles on the Inside face directed radiaily instead of the vertical direction as aforementioned. As shown the ring magnet 1' has six poles on its inside face, of which opposite poles are disposed alternately. A high coercivity magnet having the same poles on its inside face can be used. A spacer 2 of non-magnetic material in the form of a ring covers the inside surface of the ring magnet 1 and takes a L-shape in cross-section to serve as a holder by which the magnet i and the iron ring 3 sit on a base 4. For safeguarding yarn from its contact with the spacer 2, it s necessary to provide the spacer 2 with a smooth inner race preferably having wear resistance and proper hardhcs's. For this purpose, plating of the spacer surface with hard chromium serves very satisfactorily. A ring 3 of ferromagnetic material such as iron is adapted to be attracted by magnetic flux of the ring magnet 11 and thereby hung on the inside of the spacer 2. As the ring 3 is attracted by the flux produced by the poie positioned at the side face of the ring magnet 11' and the attractive force working on the ring 3 is suitably moderated by the spacer 2 situated within the magnet 1, the stabilization of the ring 3 afloat in hanging state can be secured within the spacer 2.

In the ring system as shown in FIGS. 1 and 2, the ring 3 used for stabilized hanging by attraction must have about the same height with the ring magnet, is. rectangle, ellipse or their modified form in cross-section, due to the use of a ring magnet having poles in its vertical direction, while FIGS. 4 and 5 indicate that due to the change in polar direction of a ring magnet, the ring 3 having a less height and a circular form in cross-section can be stably hung. The outcome is that it is possible to avert change in the twisting angle caused by vertical motion of the ring plate; to decrease the area where the yarn contacts the side surface of the inner ring so as not to produce fuzzy yarns, and to operate at higher speed than ever known. As to the cross-sectional form of the inner ring, it can be easily modified according to the variation in quality of yarn to be spun. In other words, the scope of change in ring form without losing the stability is much expanded.

I FIG. 6 illustrates the modified ring in operation, which is the same as in FIG. 3.

Differences between the ring of the invention and the ordinary ring-traveller system will be clear from the following test results.

To determine the number of twist by the spinning tester, a roving composed of worsted roving (white) and synthetic fibre (black) was used to spin 48s with a 20.7- fold draft ratio.

An ordinary ring-traveller system consisting of an oil ring for worsted spinning of 50 mm. in diameter and a traveller (860 grains/ 100 pieces) was used, while the ring of the invention was employed, consisting of a ring magnet with 6 poles of magnetic isotropic Fe-Al-Ni-Co magnet material (magnetic performance being approximately 6,000 Gauss in remanence and approximately 600 oersted in coercive force) being 62 mm. in outer diameter, 52 mm. in inner diameter and 100 mm. high, a brass spacer being 1 mm. thick, an an iron ring plated with hard chromium having an outer diameter of 49.5 mm., an inner diameter of 46.5 mm., a height of 10 mm. and a weight of 14.8 gr. A spinning test was conducted by using a bobbin formed a half of cop with copping motion of 9 inch lift under the conditions of the number of twist of 50-135/10 cm. (13-35/inch), the winding angle of 45, and the revolutions of 5000, 5500 and 6000 r.p.m. at a temperature of 25 C. with room humidity of 65%.

(i) The number of twist was measured by the twist counter of 48s having the number of twist being 56/10 cm. (12.2/inch) at 5000 r.p.m. or less. The results were shown in Table 1.

T able I.-]\ leusurcd Values of Number of Twist up l0 10 Inches Beginning of winding End of winding Bobbin No.

Ring of Ring- Ring 01' Ring Invention traveller Invention traveller system system 150 141 152 161 161 185 187 140 134 149 161 175 173 156 141 165 132 156 164 164 136 174 140 154 175 143 172 158 132 148 141 156 157 164 162 1.53 154.5 154.0 160.0 158.2 31 53 44 45 Up to 10 sin-Calculated 60. 8 60. 6 63.0 62. 3

Whercin Y represents the mean value of the above ten measured values, and R indicates the range of the above ten measured values.

The fact that the measured values exceed the calculated one as shown in the above table is due to twist shrinkage. Thus, any conscious difference is not found in the number of twist between these two systems.

(ii) FIG. 7 shows the mean value for 10-twists wherein the spindle rotation varies while the calculated number of twist is set. The result showed no conscious difference between the ordinary system 0 and the ring system M of the invention. The decreased number of twist with the increased rotations of spindle was thought to be the change in drafting speed of the front roller caused by a ring cone of the spinning tester.

(iii) FIG. 8 illustrates a comparison of the measured and the calculated value between the above two systems obtained at a given number of spindle rotations but with varied number of twist. In FIG. 8, each of the plotted points denotes the mean value for 10-twists. From this illustration, it is obvious that no conscious difference is recognized between the two systems.

(iv) The relation between the iron ring and the change in spindle rotations under a given number of twist is shown in FIG. 9. The slow running of the iron ring relative to the spindle varies with the number of twist in general but conditionally, since the slow running of the iron ring is enhanced with increase in the number of twist up to a certain value but reduced when twist exceeds that value.

(v) As seen from FIG. 10, the slow runing of the iron ring is monotonously enhanced with increase in spindle rotations.

From the above test results it is clearly observed that the ring of the invention is almost equal in characteristic to the ordinary ring-traveller system. Moreover, according to the invention, an article of consumption such as traveller can be much advantageously used for high speed operation. High revolution such as 15,00020,000 r.p.m. can be attained by using a ring according to the invention which is composed of a ring magnet 1 with six poles of magnetic isotropic Fe-Al-Ni-Co magnet material (magnetic performance being approximately 6,000 Gauss in remanence and approximately 600 oersted in coervice force) having an outer diameter of 62 mm., an inner diameter of 52 1 m., and a height of 10 mm, the pole face of 5 mm. high being adapted to collect the fiux, a brass spacer having a thickness of 1 mm, and an iron ring plated with hard chromium having an outer diameter of 49.5 mm., an inner diameter of 46.5 mm., and a height of 5 mm.

What is claimed is:

1. A ring for a yarn spinning machine in which a bobbin is adapted for winding yarn thereon, said ring comprising: an annular member of magnetic material surrounding said bobbin for guiding yarn on said bobbin, a hoop of magnetizable material surrounding said annular member and a spacer between said annular member and hoop and supporting the latter, said spacer being a fixedly supported annular element encircling said annular memher and operatively positioned with respect to said member and said hoop for maintaining said hoop and member in spaced relation with said member in contact with said spacer, said hoop of magnetizable material being polarized to exert an attractive force on said annular member to freely support the same whereby the yarn can be guided between said spacer and the annular member for being wound on said bobbin.

2. A ring as claimed in claim 1, wherein said hoop and annular member are aligned substantially in a common horizontal plane.

3. A ring as claimed in claim 2, poles which are vertically aligned.

wherein the hoop has 4. A ring as claimed in claim 2, wherein said annular member is of ferromagnetic material.

5. A ring as claimed in claim 2, wherein said spacer is non-magnetizable.

6. A ring as claimed in claim 2, wherein the hoop has poles which are alternately arranged circumferentia-lly on the hoop.

7. A ring as claimed in claim 2, wherein said spacer has a vertical face adjacent said annular member and spaced therefrom to define a continuously extending vertical space therewith, said hoop being outside of said space.

8. A ring as claimed in claim 1, wherein said spacer is of L shaped cross-section.

9. A ring for a yarn spinning machine in which a bobbin is adapted for having yarn wound thereon, said ring comprising a ring magnet having vertically oriented poles, an annular spacer member fixedly supporting said ring magnet and extending inwardly of said ring magnet and having a relatively smooth annular face, an annular member of magnetic material surrounding said bobbin and loosely supported within said spacer member to face said annular face thereof, said annular member being supported within said spacer member in freely suspended relation by magnetic attraction of said annular member by said ring magnet, said annular member being adapted for rotating with respect to said ring magnet and for oscillating within said spacer member to contact the latter while remaining suspended under the magnetic attraction between the ring magnet and the annular member.

10. A ring for a yarn spinning machine in which a bobbin is adapted for having yarn wound thereon, said ring comprising a ring magnet having poles alternately arranged circumferentially thereon, an annular spacer member fixedly supporting said ring magnet and extending inwardly of said ring magnet and having a relatively smooth annular face, an annular member of magnetic material surrounding said bobbin and loosely supported within said spacer member to face said annular face thereof, said annular member being supported within said spacer member in freely suspended relation by magnetic attraction of said annular member by said ring magnet, said annular member being adapted for rotating with respect to said ring magnet and for oscillating within said spacer member to contact the latter while remaining suspended under the magnetic attraction between the ring magnet and the annular member.

11. A non-magnetic spacer for use in a yarn spinning machine, wherein a ring magnet having vertically oriented poles surrounds an annular member of magnetic material which in turn surrounds a bobbin, said spacer being of L-shaped cross-section and having a smooth inner surface facing said annular member, said ring magnet being supported by said spacer outwardly of said surface and spaced from said annular member whereby said annular member is able to rotate and oscillate with respect to said ring magnet and contact said spacer as yarn is wound on said bobbin while remaining freely suspended within said spacer by magnetic attraction between said ring magnet and the annular member.

References Cited in the file of this patent UNITED STATES PATENTS 2,932,152 Jackson Apr. 12, 1960 FOREIGN PATENTS 1,024,775 France Jan. 10, 1953 534,978 Italy Oct. 28, 1955 

1. A RING FOR A YARN SPINNING MACHINE IN WHICH A BOBBIN IS ADAPTED FOR WINDING YARN THEREON, SAID RING COMPRISING: AN ANNULAR MEMBER OF MAGNETIC MATERIAL SURROUNDING SAID BOBBIN FOR GUIDING YARN ON SAID BOBBIN, A HOOP OF MAGNETIZABLE MATERIAL SURROUNDING SAID ANNULAR MEMBER AND A SPACER BETWEEN SAID ANNULAR MEMBER AND HOOP AND SUPPORTING THE LATTER, SAID SPACER BEING A FIXEDLY SUPPORTED ANNULAR ELEMENT ENCIRCLING SAID ANNULAR MEMBER AND OPERATIVELY POSITIONED WITH RESPECT TO SAID MEMBER AND SAID HOOP FOR MAINTAINING SAID HOOP AND MEMBER IN SPACED RELATION WITH SAID MEMBER IN CONTACT WITH SAID SPACER, SAID HOOP OF MAGNETIZABLE MATERIAL BEING POLARIZED TO EXERT AN ATTRACTIVE FORCE ON SAID ANNULAR MEMBER TO FREELY SUPPORT THE SAME WHEREBY THE YARN CAN BE GUIDED BETWEEN SAID SPACER AND THE ANNULAR MEMBER FOR BEING WOUND ON SAID BOBBIN. 